1. Use egrep and a regular expression to find all the words in /usr/share/dict/words that consist entirely of lowercase letters.

egrep '\b[a-z]' /usr/share/dict/words | wc -w

402158

2. Use egrep and a regular expression to find all the movies in /tmp/bette.txt that have at least one repeated uppercase letter, such as The Watcher in the Woods (1980). (Note the two occurrences of W.)

3. Use egrep and a regular expression to find the one word in /usr/share/dict/words that has ELEVEN consecutive consonants, regardless of case.

4. Use egrep and a regular expression to find the one word in /usr/share/dict/words that starts and ends with the same eight characters.

5. Use egrep and a regular expression to find all the all-vowel (regardless of case) words in /usr/share/dict/words.

6. Use egrep and a regular expression to find the one word in /usr/share/dict/words that is composed entirely of 8 consonants (regardless of case).

7. Use egrep and a regular expression to find all the entries in /etc/passwd for those users whose first name as listed (in the name field) begins with a V or v.

Hint-1: My solution found 49 such entries.

Hint-2: Sometimes, for reasons unknown, users have a space before their name in the name field of /etc/passwd.